signup funcitonality

backend/package.json

@@ -27,8 +27,10 @@
     "@nestjs/passport": "^10.0.3",
     "@nestjs/platform-express": "^10.0.0",
     "dotenv": "^16.4.5",
+    "ejs": "^3.1.10",
     "mongodb": "^6.8.1",
     "moongoose": "^0.0.5",
+    "nodemailer": "^6.9.15",
     "nodemon": "^3.1.4",
     "passport-jwt": "^4.0.1",
     "reflect-metadata": "^0.2.0",
@@ -38,9 +40,11 @@
     "@nestjs/cli": "^10.0.0",
     "@nestjs/schematics": "^10.0.0",
     "@nestjs/testing": "^10.0.0",
+    "@types/ejs": "^3.1.5",
     "@types/express": "^4.17.17",
     "@types/jest": "^29.5.2",
     "@types/node": "^20.3.1",
+    "@types/nodemailer": "^6.4.15",
     "@types/supertest": "^6.0.0",
     "@typescript-eslint/eslint-plugin": "^6.0.0",
     "@typescript-eslint/parser": "^6.0.0",

backend/src/auth/auth.controller.ts

@@ -1,12 +1,37 @@
-import { Controller, Get } from '@nestjs/common';
+import { Controller, Post, Req, Res, Next } from '@nestjs/common';
+import { Request, Response, NextFunction } from 'express';
 import { AuthService } from './auth.service';
+import { User } from '../user/user.schema'
+import sendEmail from '../utils/sendMail';
 
 @Controller('auth')
 export class AuthController {
   constructor(private readonly authService: AuthService) {}
 
-  @Get()
-  get(): string {
-    return "Auth is running!";
+  @Post('signup')
+  async signup(@Req() req: Request, @Res() res: Response, @Next() next: NextFunction){
+    const { email, password } = req.body;
+
+    const user = await User.findOne({ email });
+    if(user) return res.status(400).json({ message: 'User already exists' });
+
+    const newUser = { email, password };
+
+    const activationToken = await this.generateActivationToken(newUser);
+    const activationUrl = `${process.env.CLIENT_URL}/auth/activate/${activationToken}`;
+
+    try {
+      await sendEmail({
+        email: newUser.email,
+        subject: 'Activate your account',
+        template: 'activation.ejs',
+        data: { activationUrl }
+      });
+
+      res.status(201).json({ message: 'User created. Check your email to activate your account' });
+    } catch (error: any) {
+      console.error('Error sending email:', error);
+      next(error);
+    }
   }
 }

backend/src/utils/sendMail.ts

@@ -0,0 +1,54 @@
+import * as nodeMailer from 'nodemailer';
+import { Transporter } from 'nodemailer';
+import * as ejs from 'ejs';
+import * as path from 'path';
+require('dotenv').config();
+
+interface EmailOptions {
+  email: string;
+  subject: string;
+  template: string;
+  data: { [key: string]: any };
+}
+
+const renderFileAsync = (filePath: string, data: any): Promise<string> => {
+  return new Promise((resolve, reject) => {
+    ejs.renderFile(filePath, data, (err, str) => {
+      if (err) return reject(err);
+      resolve(str);
+    });
+  });
+};
+
+const sendMail = async (options: EmailOptions): Promise<void> => {
+  const transporter: Transporter = nodeMailer.createTransport({
+    host: process.env.SMTP_HOST,
+    port: parseInt(process.env.SMTP_PORT || '587'),
+    service: process.env.SMTP_SERVICE,
+    auth: {
+      user: process.env.SMTP_MAIL,
+      pass: process.env.SMTP_PASSWORD,
+    },
+  });
+
+  const { email, subject, template, data } = options;
+
+  try {
+    const templatePath = path.join(__dirname, '../mails', template);
+    const html: string = await renderFileAsync(templatePath, data);
+
+    const mailOptions = {
+      from: process.env.SMTP_MAIL,
+      to: email,
+      subject,
+      html,
+    };
+
+    await transporter.sendMail(mailOptions);
+  } catch (error) {
+    console.error('Error sending email:', error);
+    throw error;
+  }
+};
+
+export default sendMail;